Hyenae is a highly flexible and platform independent network packet generator. It allows you to reproduce low level Ethernet attack scenarios (such as MITM, DoS, and DDoS) to reveal potential security vulnerabilities of your network. Besides smart wildcard-based address randomization, a highly customizable packet generation control, and an interactive attack assistant, Hyenae comes with a clusterable remote daemon for setting up distributed attack networks.
pymiproxy is a small, lightweight, man-in-the-middle embeddable proxy capable of performing HTTP and HTTPS (or SSL) inspection. The proxy provides a built-in certificate authority that is capable of generating certificates for SSL-based destinations. Pymiproxy is also extensible, and provides two methods for extending the proxy: method overloading and a pluggable interface. It is ideal for situations where you're in dire need of a proxy to tamper with out- and/or in-bound HTTP data.